401564647 has 8 divisors (see below), whose sum is σ = 445252752. Its totient is φ = 359073600.

The previous prime is 401564641. The next prime is 401564717. The reversal of 401564647 is 746465104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401564647 - 2⁷ = 401564519 is a prime.

It is a super-2 number, since 2×401564647² = 322508331440469218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401564641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298558 + ... + 299899.

It is an arithmetic number, because the mean of its divisors is an integer number (55656594).

Almost surely, 2^401564647 is an apocalyptic number.

401564647 is a deficient number, since it is larger than the sum of its proper divisors (43688105).

401564647 is a wasteful number, since it uses less digits than its factorization.

401564647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598529.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 401564647 is about 20039.0779977523. The cubic root of 401564647 is about 737.7657512829.

The spelling of 401564647 in words is "four hundred one million, five hundred sixty-four thousand, six hundred forty-seven".